1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology China Agricultural University Beijing People's Republic of China
2. State Key Laboratory of Biological Feed Ministry of Agriculture and Rural Affairs, Boen Biotechnology Co. LTD Guangzhou China
3. Animal Nutrition Group Wageningen University and Research Wageningen The Netherlands
4. Swine Nutrition and Production, West Central Research and Outreach Center University of Minnesota Morris MN USA